Selection Of Optimum Structural Systems
And Materials
Author(s)
O. S. Al Shamrani & G. G. Schierle
Abstract
This paper proposes procedures and guidelines for the selection of optimum
structural systems and materials in two stages. Stage one is based on a list of
criteria, including architectural considerations. Stage two evaluates selected
systems and materials for optimum performance of criteria considered critical for
a given project. A tall office building in Dammam, Saudi Arabia is used as a
case study to compare three structural systems: moment frame, braced frame,
and shear wall; as well as two materials: concrete and steel. The case study
considers four building heights: 10, 20, 30, and 40 stories. The STAAD Pro
2005 software is used to analyze these systems according to allowable stress
requirements for an objective function to minimize drift, at minimal cost for a
wind speed of 90 mph. Shear wall is the optimum structural system and concrete
the optimum material to minimize lateral drift at minimum material and labor
costs.
Keywords: lateral drift, wind load, IBC 03, allowable stress, STAAD Pro.
1 Introduction
The selection of structural system and material is often done according to
personal experience or perception without being evaluated as it should be for
optimum performance. The proposed selection process provides a methodology
to determine the selection of the optimum structural system. Since in Saudi
Arabia wind load is more critical than seismic load, this paper investigates wind
effect on tall buildings. Since wind load increases with height on tall buildings
and causes lateral deflection (drift), minimizing lateral drift is an important
criterion to select structural systems for tall buildings. Controlling drift is vital
Keywords
lateral drift, wind load, IBC 03, allowable stress, STAAD Pro.
Related Book
Other papers in this volume
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